/**
 * Copyright (C) 2017 - 2020 https://github.com/joewee
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.bifrost.service.impl;

import com.bifrost.constant.AssociationType;
import com.bifrost.entity.ProductService;
import com.bifrost.entity.SkuAssociation;
import com.bifrost.repository.SkuAssociationRepository;
import com.bifrost.service.SkuAssociationService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Example;
import org.springframework.data.domain.Sort;
import org.springframework.data.jpa.domain.Specification;
import org.springframework.stereotype.Service;

import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import java.util.List;

/**
 * @author joewee
 * @version 1.0.0
 * @Date 2018/1/9 16:54
 */
@Service
public class SkuAssociationServiceImpl implements SkuAssociationService {
    @Autowired
    SkuAssociationRepository skuAssociationRepository;

    /**
     * 获取指定类型的附属
     *
     * @param type
     * @return
     */
    @Override
    public List<SkuAssociation> findServices(String type) {
        return null;
    }

    /**
     * 获取指定类型和服务的附属
     *
     * @param service
     * @return
     */
    @Override
    public List<SkuAssociation> findServices(ProductService service) {
        SkuAssociation example = new SkuAssociation();
        if (service != null) {
            example.setProductService(service);
        }
        example.setAssociationType(AssociationType.SERVICE);
        return skuAssociationRepository.findAll(Example.of(example), new Sort(Sort.Direction.ASC, "sortOrder"));
    }

    /**
     * 获取指定类型和服务的附属
     *
     * @param services
     * @return
     */
    @Override
    public List<SkuAssociation> findServices(List<ProductService> services) {
        if (services == null) {
            return null;
        } else {

            Specification<SkuAssociation> query = new Specification<SkuAssociation>() {
                @Override
                public Predicate toPredicate(Root<SkuAssociation> root, CriteriaQuery<?> query, CriteriaBuilder cb) {
                    Predicate type = cb.equal(root.get("associationType"), AssociationType.SERVICE);
                    CriteriaBuilder.In<ProductService> in = cb.in(root.get("productService"));
                    in.in(services);
                    return null;
                }
            };
            return skuAssociationRepository.findAll(query);

        }
    }
}
